mpirun

launches MPI parallel programs

TLDR

Run MPI program

$ mpirun -np [4] [program]

Run on multiple hosts

$ mpirun -np [8] --hostfile [hosts.txt] [program]

Run with specific slots per host

$ mpirun -np [4] --map-by node [program]

SYNOPSIS

mpirun [options] program [args...]

DESCRIPTION

mpirun launches MPI parallel programs. Starts multiple processes across nodes for distributed computing. Part of OpenMPI or MPICH implementations.

PARAMETERS

-np n

Number of processes.

--hostfile file

File with host list.

--host hosts

Comma-separated hosts.

--map-by policy

Process mapping (node, slot, core).

--bind-to policy

Process binding.

-x var

Export environment variable.